JCPERF

You got to learn assembling on some engine sooner or later

Titan

Do you think we hurt anything when we shoved the cam in without any lube. Or regard for the Lobes!!!!

Strip Poker 388

iTrader: (6)

If I had dry tail pipes The Whipple blower whine is a lot louder that my old Scarab w/ the littlefields .

Here is a shety clip with buddy driving up to about 5500rpm and me trying to Video it

http://media.putfile.com/Hustler-Whi...eo-7-24-05-040

Jassman

Something cool to wake up to, how fast were you going there.

Strip Poker 388

iTrader: (6)

Around 90

Panther

Masher will be ok... who's gonna roll the dice?

Nice clip, gotta love blowers!

dykstra

iTrader: (1)

great clip!!!!!!!!!!!

tomcat

Jassman: This is Rob's thread so I'll be brief. The dyno numbers (with 7 psi pulleys) are comparable enough to point out the charateristics of the two different blower designs. On one hand we did not run accessories and the headers were Mark's sport tubes; on the other hand we used stock heads and cam and did not rev over 5500 RPM. These variables prevent an absolute comparison but the short answer is: screw compressor will make more down low, centrifugal compressor will make more up high.

RPM Rtech Whipple

3500 458 520
4000 574 615
4500 664 685
5000 740 726
5500 803 762
6000 ------ 779

Hey Rob: I've been looking over your installation pictures again. They demonstrate the meaning of the word "blueprinting". Be careful though, attention to detail can sometimes lead to OCD!

Strip Poker 388

iTrader: (6)

I do have a problem with OCD

player

Strip- Great job-turning props in or out. What gear, what lower, crescent or standard.What trim setting and tabs.

VeeCat

Strip,
Info if it helps you any,
2003 388 with ITS 1.5 Gear Ratio Sportmaster Lowers 500EFI's with Whipple's
34' four blade Merc props
105 GPS and still climbing..........
Louisiana Run on Pontrain Cool Fall Air
VeeCat

VeeCat

Strip,
This boat also has a Westerbeke Generator and Air, slight drag from the water inlets for these.
VeeCat

TeamSaris

That is a lot of boost. We normaly run 6-7. They will make low 700's with 6-7.

Strip Poker 388

iTrader: (6)

V cat I would like to get some picks if ya have some to email to me ??

It has the Bmax 1.30 gear 28 p 4blade B1 prop,turning props out ,no bow lift now,tabs -1/2.drives at +1or 2.reg bravo on foot low water pickup,I just bought some 30P should beable to turn the 6000k


fast fun 2 ...at 7 psi it was 779hp


Thanks

Rob

VeeCat

Strip,
I don't have your email address so I will leave you mine
boatmail is the first part the at sign then charter dot NET. Something about spammers is why I am writing this way.
I did notice in running this boat that you must keep your tabs at least level or a touch in. Bringing them all the way up does not work on this slick, FAST hull. Do whatever you want with the drives as far as raising until you get max speed no problem. Remember on a stepped hull not to lower into the negative trim area with the drives. But correct Tab is critical. At least in my seat time. These boats must have some bird in them,
Because they FLY!
Over 100 mph with gen/air/TV/DVD and complimentary HUSTLER PORN.
VeeCat

Strip Poker 388

iTrader: (6)

Veecat I sent ya a email Let me know if ya dont get it?

Rob

Jassman

Just trying to find out what the difference is between the two, which was explained in your comparison. Thanks. I have 3.3 Whipples, different block though. Jeff

Strip Poker 388

iTrader: (6)

Jeff hows your project going????

Jassman

Waiting for TMP to get back to me. I speak with Eddie once a week, parts are back except for the Whipples.

Strip Poker 388

iTrader: (6)

How the new boat comming? you going to be running this summer

Rob

articfriends

iTrader: (1)

Does the new style lower your talking about have gears stronger than stock xr gears,I'm still exploring my options for this upcoming year,Smitty

Strip Poker 388

iTrader: (6)

Yes,he said 950TQ...... Dean is also having some helical style lower gears thats fixing to go into them that will be even stronger.He also offers a extended warranty on his new HT drives

I have about 275 hours on my Bmax's and have never had a HP or TQ related failure . Dean said he has never seen his upper fail.

The Bravo Shop costumer service has been outstanding /fast Dean has always taking care of me..

Smitty call and talk to him ,he will shoot ya straight

Rob

Jassman

Trying to finalize, 22k apart, Im ready.

Strip Poker 388

iTrader: (6)

Jeff goodluck at the show


Here are the plugs . Its was safe/fat

Did a leek down before I tore it down ,there soso

Strip Poker 388

iTrader: (6)

Well so far so good.I tightened up the ring gaps and higher boost now its making a little more power it does seem stronger.Ill start a new thread with all the Dyno sheets. Waiting on my buddy Chris to send me the Video of the Dyno pull at 11.5 lbs of boost.That Whipple blower whine was making some noise

Just waiting on the new B-Max's

Rob

articfriends

iTrader: (1)

Rob,I just re-read this whole thread,how many hours did you have on it from last season before refreshening it? Were the rings beveled or soft,I see you mentioned they looked bad. I ran my 540 135 or 140 hours last time before freshening and the rings seemed like they lost there strength when I was pulling them off the pistons like they had gotten soft. I did try running 11-12 lbs of boost though too without big enough injectors before rebuilding last time also which is probably what did the rings in. My timing chain also had pitting in the rollers. I only put about 40-45 hours on the 944 hp version of my 540 last year so I'm not freshening it this year,Smitty

tomtbone1993

iTrader: (3)

just add some NOS............

dykstra

iTrader: (1)

congrats

Strip Poker 388

iTrader: (6)

It was about 50 hours . I had thought I had more on it.But after the hurricane we didn't use it much.The ring gap was what I didn't like,The rings looked ok,still springy, they had half of ring was Grey on the face so there wasn't much wear on the face.Kinda like they had some more seating??The main reason for the rering I had a little blow by but I guess thats norm with a blower motor with big ring gaps,and I turned the boost up [10]for about a half a tank of gas and wanted to see the condition of the inside just for the hell of it.I went real Conservative on ring gap before and wanted to tighten it up.There was no butting.I am use to NOS motors ring gaps The bearings look real good ,still fit tight in the saddles . I even reused all of them.Most of the motors I have built usually has some trash got thru them but this one I was surprised how clean it was .I figure I can leave it together next winter. I should get 2 or more seasons this time around.I guess as long as the stock crank hangs in there


Tell me what you all think of the pick?

Rob

Strip Poker 388

iTrader: (6)

Strip Poker 388

iTrader: (6)

I am guessing the dark color is from the overlap of the cam.What do you think????? Crane 741.Maybe blow thru?

Strip Poker 388

iTrader: (6)

This is the bad thing about the Fel Pro Metal layer gaskets .. the black stuff is a beoch to get off the surfaces

Strip Poker 388

iTrader: (6)

Steady state pull

http://d.turboupload.com/d/523629/Hu...6_012.mpg.html

rmbuilder

Rob,
Exhaust reversion on the intake side. There are multiple causes working independently or in conjunction with each other creating this condition. The spent charge is working its way past the intake valve back into the port/plenum area, concluding this is occurring during the IVO portion of overlap. As the piston rises during the exhaust cycle, expelling the spent charge (with your valve events), the intake valve opens @ 38º BTDC. Ideally, at this point, the intake column will have enough energy to initiate column motion; the exiting gasses have enough velocity to create a depression behind the exiting charge assisting the entering intake column. If the pressure differential of the combustion area > the intake port you have intake reversion. Soot.

Spring bounce would occur only at IVC where the piston is rising on the compression cycle with fresh charge in the cylinder. This would decrease charge trapping, VE, and cylinder pressure, without the soot deposits.

Your cam is advanced 5º on 107º ICL/112º LSA, however retarding it (on a ground cam) for a later IVO might not be the answer. This will retard the other 3 events at the same time quite possibly creating a whole new set of adverse conditions.

Causes can work independently or combination
Low intake port velocity
Low exhaust port velocity
Exhaust restriction
Early IVO, excessive overlap

Photo of reversion courtesy Larry Meaux
Bob

Strip Poker 388

iTrader: (6)

Thanks Bob for the input

So the Intake valve is opening to early letting in the spent charge containment the intake charge, passing each other in the intake runner? With this making the soot build up on the lower intake inlet. With This only happing at idle until intake port velocity builds up/ off idle and the whipple start pushing the air in

I figure the low intake port velocity (stock heads)and the Crane 741 cams excessive overlap contributed to this.So a better cam for the heads I have or a better set of heads would help this . but again this mainly happens at idle until intake port velocity pushes the charge in making the boom boom

Bob what is the difference in the overlap on my cam[741] over a similar cam that is made epically for a blower motor??

I guess thats why they say the stock 500efi cam works real good with a blower.

If I change the intake valve opening to later,also less over lap like normal blower cams I wouldn't bealbe to run the boost I am running ? But I guess the motor would make more power with less boost with a tighter cam???

This is making my head hurt I need a beer


Rob

tomtbone1993

iTrader: (3)

just put the motors in A Fountain and you will be well over 100MPH

Strip Poker 388

iTrader: (6)

OK daddy


Tom ya got yours running yet????

tomtbone1993

iTrader: (3)

hell no still waitng on parts

29scarab

[QUOTE=tomtbone1993]hell no still waitng on parts [/QUOTE

I'm still wainting myself for the marine mechanic to get his act together!

Strip Poker 388

iTrader: (6)

Tail pipes???